package cn.jcet.mapreduce.kv2;

import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;

import java.io.IOException;

/**
 * @author 鲜磊
 * @Date 2020/12/7 23:03
 */
public class KVTextMapper2 extends Mapper<LongWritable,Text,Text,IntWritable> {

    Text k = new Text();

    IntWritable v = new IntWritable(1);

    @Override
    protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
        String line = value.toString();
        String[] vals = line.split(" ");
        // 只选择第一个单词
        k.set(vals[0]);

        context.write(k,v);
    }
}
